Patent US3676414A successfully refreshed from Google Patents.
US3676414A
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Process for polymerizing {60 -olefins
Assignee: Hoechst AG
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Filing: 1969-06-25
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Granted: 1972-07-11
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Expires: 1989-06-25
Abstract
Abstract The invention provides a process for homopolymerizing or copolymerizing ethylene in the presence of mixed catalysts comprising as component A the reaction products of specific tetravalent titanium compounds with chlorine-containing magnesium compounds containing at least 1.5 moles of OH groups per gramatom of magnesium and as component B an organo-aluminum compound. Under a pressure below 20 atmospheres the yields are so high per unit of catalyst that the residues thereof need not be removed from the polymer. It is possible to produce polymers having a very narrow distribution of molecular weight and very good color and corrosion values.
Inventors
- 👤 Bernd Diedrich
- 👤 Karl Diether Keil
- 👤 Kurt Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:50
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The process of claim 1 whErein the molecular weight of the resulting polymer is regulated by means of hydrogen.
Claim 2
Dependent Claim
41 words
The process according to claim 1 wherein component A is obtained by reacting the components at a temperature of between 0* and 200* C. in the presence of an inert diluent and washing the resulting reaction product to remove unreacted TiCl2(O-i-C3H7)2.
Claim 3
Dependent Claim
20 words
The process according to claim 1 wherein component A contains 0.05 to 10 mg-atom titanium per gram of component A.
Claim 4
Dependent Claim
32 words
The process according to claim 1 wherein the organo-aluminum compound has the formula R2AlCl or R3Al2Cl3 in which R stands for identical or different alkyl radicals having one to 16 carbon atoms.
Claim 5
Dependent Claim
18 words
The process of claim 1, wherein component A is prepared at a temperature of 0* to 200* C.
Claim 6
Dependent Claim
42 words
The process of claim 1, wherein the organo-aluminum compound is an aluminum trialkyl of the formula Al(R)3 or a dialkyl aluminum hydride of the formula Al(R)2H in which R stands for identical or different hydrocarbon radicals having one to 16 carbon atoms.
Claim 7
Dependent Claim
16 words
The process of claim 1, wherein propylene, butene-(1) and 4-methylpentene-(1) are used as the Alpha -olefin.
References Cited (Backward Citations)
US2981725A
Cited
US3166542A
Cited
US3232913A
Cited
US3400110A
Cited
NL6714024A
Cited
FR1560467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |